ULTRASOURCE ULTRAVAC 2100, Owner'S Manual

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or clogged (where applicable).
Remedy:
Replace the automotive-type oil filter,
exchange the oil, if necessary, and refill with fresh oil.
Possible Cause:
The inlet anti-suck-back valve plate
(Ref. 251) is stuck in closed or partially open position
due to contamination.
Remedy:
Disassemble the inlet valve and screen.
Clean as required.
Possible Cause: The oil tubing fittings are loose and
leaking.
Remedy: Replace or retighten the oil fittings or oil tub-
ing. Replace only with same size tubing.
Possible Cause:
Shaft seal leaking.
Remedy:
Replace the shaft seal following disassem-
bly and assembly steps outlined in the Maintenance
and Repair Manual. Check the shaft seal. It should
have a spring installed inside and around the shaft seal-
ing lip.
Possible Cause: Exhaust valve (Ref. 159) is not
properly seated or it is partially stuck open.
Remedy:
Contact the nearest Busch Factory Service
Center for instructions.
Possible Cause:
Vanes are blocked in rotor or are
otherwise damaged.
Remedy:
Free vanes or replace with new ones.
Contact the nearest Busch Factory Service Center for
instructions.
Possible Cause:
The radial clearance between the
rotor and cylinder is no longer adequate.
Remedy:
Contact the nearest Busch Factory Service
Center for instructions.
Possible Cause: The internal parts are worn or dam-
aged.
Remedy: Contact the nearest Busch Factory Service
Center for instructions.
Possible Cause:
The inlet filter is clogged due to
process material.
Remedy:
Contact the factory for recommendation on
proper filter cartridge.
4.2 Trouble
Pump will not start.
Possible Cause: The motor does not have the prop-
er supply voltage or is overloaded; the motor starter
overload settings are too low or are the wrong setting;
fuses are burned; or the wire is too small or too long,
causing a voltage drop at the pump.
Remedy:
Check correct supply voltage; check over-
load settings in motor starter for size and setting
according to motor nameplate data; check fuses; and
install proper size wire. If the ambient temperature is
high, use larger size overloads or adjust the setting 5%
above nominal motor nameplate value.
Possible Cause:
The pump or motor is blocked.
Remedy: Remove the fan cover and try to turn pump
and motor by hand. If frozen, remove the motor from
the pump and check the motor and the pump separate-
ly. If the pump is frozen, contact the nearest Busch
Factory Service Center for instructions.
4.3 Trouble
The pump starts, but labors and draws a
very high current.
Possible Cause: The oil is too heavy (viscosity too
high) or the ambient temperature is below 5 degrees C
(41 ° F).
Remedy: Change to R580 vacuum oil if very cold, or
warm up the oil before filling.
Possible Cause:
Pump is running in the wrong direc-
tion.
Remedy:
Check for the correct rotation which is coun-
terclockwise when looking at the motor from the motor's
fan side. Reverse any two leads on the motor to
change the direction of rotation.
Possible Cause: The pump is overfilled with oil or
the wrong kind of oil is used.
Remedy:
Correct the oil level and quality per Section
1.5 and use recommended motor oil.
Possible Cause:
Exhaust filters in exhaust chamber
are clogged and appear burned black with pump oil.
Remedy:
Replace the exhaust filters, maintain proper
oil condition, oil level, and use only Busch recommend-
ed vacuum oil and filters.
Possible Cause:
Loose connection in motor terminal
box; not all motor coils are properly connected. The
motor operates on two phases only.
Remedy:
Check the motor wiring diagram for proper
hookup, especially on motors with six internal motor
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